In order to investigate the failure mechanism of the wind turbine blade mold turning bracket, the improved explicit contact algorithm was used to simulate the turning seat. Firstly, the force of turning bracket is calculated, and the dangerous parts in 6 turning seat are selected for FE modeling using solid elements. In the model, based on the classical explicit dynamic algorithm, the gap variable of the element is improved by the method of barycenter position mapping, and then the simulation is carried out. Finally, the stress nephogram of the turning seat is obtained. The results show that the alternating load applied on the push rod of hydraulic cylinder induces the fracture of the push rod in its middle, and the improved algorithm further reduces the element disturbance. The calculation stability is increased by 13% and the calculation times are increased by 6%. It provides a theoretical and practical reference for the contact calculation of large parts.
Key words
wind turbine blades /
failure analysis /
finite element method /
explicit dynamic algorithm /
blade mould
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